※ 引述《CGHS13 (.......)》之铭言： : Telomerase is an enzyme that is produced only in cells that are actively : dividing. For this reason it is generally absent from body tissues in adults : Bone marrow is an exception to this rule, however, since even in adults, bone : marrow cells continually divide to replace old blood cells. Cancers are : another exception, because their cells are rapaidly dividing. : A. Telomerase is the only enzyme that is present in cancerous cells but : absent from cells that are not activly dividing. : B. in children, the only body tissues from which telomerase is absent are : those ins which cells are not rapidly dividing. : C. The presence of telomerase in bon marrow is no indication of bone marrow : cancer. : D. Cancer of the bone marrow develops more rapidly than cancer growing in any : other kind of adult tissue. : E. The level of telomerase production is always higher in cancerous tissue : than in noncancerous tissue. : the information provided most strongly supports which if the following? : the answer is C : 不懂....? : why not E? : 题目说的不是 Telomerase 只存在於分裂活跃的细胞中 : 因为这个原因 所以很少产生在成人体内 : 但是bone marrow 与 Cancer 是例外 : 存在於bone marrow 是因为bone marrow cell 不断分裂以替代老的红血球细胞 : cancer 是因为他们的细胞快速在分裂 : 所以 C ?... C是无法挑错的答案 因为他提到骨髓跟cancer都是例外，所以骨髓有T酵素并不代表得了骨髓癌 E不对 因为他只提到T酵素会在细胞分裂的情况出现 没有提到分裂越快的地方就越多T酵素，所以有可能在骨髓的地方T酵素更多 -- 喜欢跟爱是不一样的 喜欢是荡秋千 可以自得其乐 不需要别人的回应 爱是翘翘板 需要一个人坐在对面与你互动 贴近你内心的感觉... --

※ 发信站: 批踢踢实业坊(ptt.cc) ◆ From: 140.112.4.234